68210440 has 32 divisors (see below), whose sum is σ = 154376280. Its totient is φ = 27123712.

The previous prime is 68210423. The next prime is 68210453. The reversal of 68210440 is 4401286.

It can be written as a sum of positive squares in 4 ways, for example, as 62631396 + 5579044 = 7914^2 + 2362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1992 + ... + 11848.

Almost surely, 2^68210440 is an apocalyptic number.

It is an amenable number.

68210440 is an abundant number, since it is smaller than the sum of its proper divisors (86165840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68210440 is a wasteful number, since it uses less digits than its factorization.

68210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10041 (or 10037 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 68210440 is about 8258.9611937580. The cubic root of 68210440 is about 408.5861273293.

The spelling of 68210440 in words is "sixty-eight million, two hundred ten thousand, four hundred forty".